US 11,893,936 B2Granted

Pixel driving circuit, display panel, driving methods, and display apparatus

AssigneeBoe Technology Group Co., Ltd.

InventorsZhichong Wang, Fuqiang Li, Peng Liu, Jing Feng, Xinglong Luan

Life of this patent

Estimating the term…

Loading patent…

Abstract

A pixel driving circuit includes a driving sub-circuit, a signal writing sub-circuit, a compensation sub-circuit, a light-emitting control sub-circuit and an initialization sub-circuit. The signal writing sub-circuit is configured to write a voltage of a data signal terminal into the driving sub-circuit as a data voltage. The light-emitting control sub-circuit is configured to, in conjunction with the driving sub-circuit, drive a light-emitting device to emit light. The initialization sub-circuit is configured to transmit the voltage from the data signal terminal to the compensation sub-circuit as a reset voltage. The compensation sub-circuit is configured to transmit the reset voltage from the initialization sub-circuit to the driving sub-circuit to reset the driving sub-circuit.

Claims19

Dependent claims

A pixel driving circuit, comprising:

a driving sub-circuit, a signal writing sub-circuit, a compensation sub-circuit, a light-emitting control sub-circuit and an initialization sub-circuit, wherein
the signal writing sub-circuit is coupled to a data signal terminal, a first control signal terminal and the driving sub-circuit;
the signal writing sub-circuit is configured to, under control of a signal from the first control signal terminal, write a voltage of the data signal terminal into the driving sub-circuit as a data voltage;
the light-emitting control sub-circuit is coupled to a light-emitting control terminal and the driving sub-circuit, and the light-emitting control sub-circuit is configured to be further coupled to a light-emitting device;
the light-emitting control sub-circuit is further configured to, under control of a signal from the light-emitting control terminal, in conjunction with the driving sub-circuit, drive the light-emitting device to emit light;
the initialization sub-circuit is coupled to the data signal terminal, a second control signal terminal and the compensation sub-circuit;
the initialization sub-circuit is configured to, under control of a signal from the second control signal terminal, transmit a voltage from the data signal terminal to the compensation sub-circuit as a reset voltage;
and
the compensation sub-circuit is further coupled to the driving sub-circuit and the first control signal terminal;
the compensation sub-circuit is configured to, under the control of the signal from the first control signal terminal, transmit the reset voltage from the initialization sub-circuit to the driving sub-circuit to reset the driving sub-circuit, wherein
the driving sub-circuit includes a driving transistor and a capacitor;
a first end of the capacitor is coupled to a gate of the driving transistor and the compensation sub-circuit, and a second end of the capacitor is coupled to the signal writing sub-circuit;
the signal writing sub-circuit is configured to, under the control of the signal from the first control signal terminal, write the voltage of the data signal terminal to the second end of the capacitor as the data voltage;
and the compensation sub-circuit is configured to, under the control of the signal from the first control signal terminal, transmit the reset voltage from the initialization sub-circuit to the gate of the driving transistor to reset the gate of the driving transistor;
and
the compensation sub-circuit is further coupled to a third control signal terminal;
the compensation sub-circuit is further configured to, under control of signals from the first control signal terminal and the third control signal terminal, write a threshold voltage of the driving transistor to the first end of the capacitor.

14 more elements

A method for driving a display panel, the display panel including a plurality of sub-pixels;

each sub-pixel including a respective pixel driving circuit;
the pixel driving circuit including a driving sub-circuit, a signal writing sub-circuit, a compensation sub-circuit, a light-emitting control sub-circuit and an initialization sub-circuit;
the signal writing sub-circuit being coupled to a data signal terminal, a first control signal terminal and the driving sub-circuit;
the light-emitting control sub-circuit being coupled to a light-emitting control terminal and the driving sub-circuit, and the light-emitting control sub-circuit being configured to be further coupled to a light-emitting device;
the initialization sub-circuit being coupled to the data signal terminal, a second control signal terminal and the compensation sub-circuit;
the compensation sub-circuit being further coupled to the driving sub-circuit and the first control signal terminal;
the method for driving the display panel having a plurality of control cycles;
each control cycle including a first stage, a second stage and a third stage;
the display panel further including switch controller groups, a source driver, a plurality of scanning signal lines, a plurality of first data signal lines and a plurality of second data signal lines;
each switch controller group including a first switch and a second switch;
the compensation sub-circuit being further coupled to a third control signal terminal;
the method for driving the display panel in a control cycle of the control cycles comprising:
in a first stage, inputting turn-on signals to the first control signal terminal and the second control signal terminal;
in a first sub-stage of the first stage, controlling, by the source driver, the first switch to be turned off and the second switch to be turned on, and providing, by the source driver, an initial voltage to a second end of the first switch and a second end of the second switch;
and
in a second sub-stage of the first stage, controlling, by the source driver, the first switch to be turned on and the second switch to be turned off, and providing, by the source driver, the data voltage to the second end of the first switch and the second end of the second switch;
in a second stage, inputting turn-on signals to the first control signal terminal and the third control signal terminal;
in a first sub-stage of the second stage, controlling, by the source driver, the first switch to be turned off and the second switch to be turned on, and providing, by the source driver, the data voltage to the second end of the first switch and the second end of the second switch;
and
in a second sub-stage of the second stage, controlling, by the source driver, the first switch to be turned on and the second switch to be turned off, and providing, by the source driver, the initial voltage to the second end of the first switch and the second end of the second switch;
and
in a third stage, inputting the turn-on signal to the third control signal terminal;
in a first sub-stage of the third stage, controlling, by the source driver, the first switch to be turned off and the second switch to be turned on, and providing, by the source driver, the initial voltage to the second end of the first switch and the second end of the second switch;
and
in a second sub-stage of the third stage, controlling, by the source driver, the first switch to be turned on and the second switch to be turned off, and providing, by the source driver, the data voltage to the second end of the first switch and the second end of the second switch.

22 more elements

A method for driving a display panel, the display panel including a plurality of sub-pixels;

each sub-pixel including a respective pixel driving circuit;
the pixel driving circuit including a driving sub-circuit, a signal writing sub-circuit, a compensation sub-circuit, a light-emitting control sub-circuit and an initialization sub-circuit;
the signal writing sub-circuit being coupled to a data signal terminal, a first control signal terminal and the driving sub-circuit;
the light-emitting control sub-circuit being coupled to a light-emitting control terminal and the driving sub-circuit, and the light-emitting control sub-circuit being configured to be further coupled to a light-emitting device;
the initialization sub-circuit being coupled to the data signal terminal, a second control signal terminal and the compensation sub-circuit;
the compensation sub-circuit being further coupled to the driving sub-circuit and the first control signal terminal;
the method for driving the display panel having a plurality of control cycles;
each control cycle including a first stage, a second stage and a third stage;
the display panel further including switch controller groups, a source driver, a plurality of scanning signal lines, a plurality of first data signal lines and a plurality of second data signal lines;
each switch controller group including a first switch and a second switch;
the compensation sub-circuit being further coupled to a third control signal terminal;
the method for driving the display panel in a control cycle of the control cycles comprising:
in a first stage, inputting turn-on signals to a first control signal terminal and a second control signal terminal;
in a first sub-stage of the first stage, controlling, by the source driver, a first switch to be turned off and a second switch to be turned on, and providing, by the source driver, an initial voltage to a second end of the first switch and a second end of the second switch;
and
in a second sub-stage of the first stage, controlling, by the source driver, the first switch to be turned on and the second switch to be turned off, and providing, by the source driver, the data voltage to the second end of the first switch and the second end of the second switch;
in a second stage, inputting turn-on signals to the first control signal terminal and the third control signal terminal;
in a first sub-stage of the second stage, controlling, by the source driver, the first switch to be turned on and the second switch to be turned off, and providing, by the source driver, the initial voltage to the second end of the first switch and the second end of the second switch;
and
in a second sub-stage of the second stage, controlling, by the source driver, the first switch to be turned off and the second switch to be turned on, and providing, by the source driver, the data voltage to the second end of the first switch and the second end of the second switch;
and
in a third stage, inputting the turn-on signal to the third control signal terminal;
in a first sub-stage of the third stage, controlling, by the source driver, the first switch to be turned off and the second switch to be turned on, and providing, by the source driver, the initial voltage to the second end of the first switch and the second end of the second switch;
and
in a second sub-stage of the third stage, controlling, by the source driver, the first switch to be turned on and the second switch to be turned off, and providing, by the source driver, the data voltage to the second end of the first switch and the second end of the second switch.

22 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/796,118Filed 7 May 2021
Priority: CN 202010382816.08 May 2020
Published: US 2023/0120765 A120 Apr 2023
Granted: 6 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G09G 3/3233
Using an active matrix: with pixel circuitry controlling the current through the light-emitting element
G09G 3/3275
Organic, e.g. using organic light-emitting diodes [OLED]: details of drivers for data electrodes
G09G 2300/0819
Several active elements per pixel in active matrix panels: used for counteracting undesired variations, e.g. feedback or autozeroing
G09G 2300/0842
Several active elements per pixel in active matrix panels: forming a memory circuit, e.g. a dynamic memory with one capacitor